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Related Concept Videos

Cytotoxic Edema: Pathophysiology01:21

Cytotoxic Edema: Pathophysiology

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Cytotoxic edema is a form of cerebral edema characterized by intracellular swelling of neurons, astrocytes, and other glial cells. It develops when the mechanisms responsible for maintaining ionic gradients across the cell membrane become impaired. Under normal physiological conditions, the sodium–potassium ATPase actively transports sodium ions out of the cell and potassium ions into the cell, preserving osmotic balance and enabling electrical signaling. This pump requires a continuous...
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Cerebral Edema l: Introduction01:19

Cerebral Edema l: Introduction

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Cerebral edema is a pathological increase in brain water content that disrupts intracranial pressure regulation and impairs neurological function. Because the cranial vault is rigid, even modest increases in tissue volume can compromise cerebral perfusion, distort neural structures, and initiate secondary injury. Cerebral edema develops through four principal mechanisms: vasogenic, cytotoxic, interstitial, and ionic.Vasogenic EdemaVasogenic edema arises from disruption of the blood–brain...
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Pulmonary Edema II: Pathophysiology01:18

Pulmonary Edema II: Pathophysiology

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Pulmonary edema is the accumulation of fluid in the interstitial and alveolar spaces of the lungs, impairing gas exchange and oxygen delivery. It may be cardiogenic or noncardiogenic, but both reduce oxygenation and lung compliance.Cardiogenic Pulmonary EdemaCardiogenic edema results from increased hydrostatic pressure in pulmonary capillaries, usually due to left ventricular dysfunction from myocardial infarction, heart failure, or valvular disease. Ineffective cardiac pumping causes blood to...
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Cerebral Edema ll: Pathophysiology01:22

Cerebral Edema ll: Pathophysiology

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Vasogenic edema is a major form of cerebral edema characterized by abnormal accumulation of fluid in the brain’s extracellular space due to disruption of the blood–brain barrier (BBB). The BBB is a specialized structure composed of endothelial cells connected by tight junctions, supported by astrocytic endfeet and a basement membrane. Under normal conditions, it tightly regulates the movement of ions, proteins, and solutes between the bloodstream and brain parenchyma. When this...
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Nephrotic Syndrome I : Introduction01:24

Nephrotic Syndrome I : Introduction

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Nephrotic Syndrome is a chronic kidney disorder defined by clinical findings such as severe proteinuria, hypoalbuminemia, hyperlipidemia, and edema. These symptoms result from damage to the glomeruli, the kidney’s filtering units, increasing their permeability to proteins.Definition and Meaning:Proteinuria, defined as the loss of more than 3.5 grams of protein per day in adults, is a crucial feature of nephrotic syndrome. This condition is often accompanied by edema, the accumulation of...
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Ascites01:19

Ascites

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DefinitionAscites is the buildup of fluid inside the peritoneal cavity. It occurs when fluid moves out of the vascular system faster than the peritoneal lymphatics can remove it. This fluid shift is most commonly seen in liver cirrhosis but can also appear in several other systemic disorders.EtiologyCirrhosis remains the leading cause of ascites. Other conditions that can contribute include:Heart failureConstrictive pericarditisAbdominal cancersNephrotic syndromeSevere protein–calorie...
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Related Experiment Video

Updated: Apr 19, 2026

Isolation of Human Lymphatic Endothelial Cells by Multi-parameter Fluorescence-activated Cell Sorting
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[Acquired angioedema].

Olivier Fain1, Delphine Gobert1, Cam Anh Khau1

  • 1AP-HP, DHU i2B, université Paris 6, hôpital Saint-Antoine, centre de références des angioedèmes à kinines (CREAK), service de médecine interne, 75012 Paris, France.

Presse Medicale (Paris, France : 1983)
|December 24, 2014
PubMed
Summary
This summary is machine-generated.

Acquired angioedema, a rare condition linked to MGUS or lymphoma, mimics hereditary angioedema symptoms. Treatment involves managing attacks with C1Inh concentrate and icatibant, while rituximab

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Area of Science:

  • Immunology
  • Hematology
  • Genetics

Context:

  • Acquired angioedema (AAE) is a rare disorder.
  • It is frequently associated with lymphoproliferative disorders, including monoclonal gammopathies of uncertain significance (MGUS) and lymphomas.
  • AAE shares clinical manifestations and laryngeal risks with hereditary angioedema.

Purpose:

  • To describe the characteristics, underlying mechanisms, and management of acquired angioedema.
  • To highlight the diagnostic markers and therapeutic strategies for AAE.

Summary:

  • AAE presents with low levels of complement components C4, C1 inhibitor (C1Inh), and C1q.
  • Pathogenic mechanisms include C1Inh consumption by lymphoid cells or the development of anti-C1Inh autoantibodies.
  • Acute attacks necessitate symptomatic treatment with C1Inh concentrate and icatibant.

Impact:

  • Understanding AAE's link to lymphoproliferative disorders is crucial for diagnosis and management.
  • Current treatment focuses on acute symptom control.
  • Further research is needed to establish the efficacy of therapies like rituximab in AAE.